Yee Tak Sharon Kui, 25, who is originally from China, worked with special needs students at the Frost School in Wheaton. The school serves students with emotional and behavioral disabilities.

Investigators said Kui went to a 15-year-old student's Silver Spring home twice last month and engaged in sex and other abusive behaviors with him while his family was gone. Police said they learned of the abuse from the victim's parents.

Police said the victim told them he and Kui also had exchanged sexually explicit text messages and had phone conversations on a regular basis.

The boy's parents said it's an ordeal that has emotionally scarred their son.

"We drove by the school, and he began to literally rip pieces of the door panel off the inside of the car. It's challenging for him because with autism, he does not display his emotions, but he feels them deeper than most of us," the victim's father told 11 News.

Police said they believe Kui escaped to Hong Kong, where her brother lives, to avoid prosecution on several sex offense charges because she told the victim in a phone conversation that she would rather leave the country than go to jail.

If she's brought back to the U.S., Kui is expected to be charged with two counts of sex offense, sex abuse of a minor and sexual solicitation of a minor.